Flushing apparatus.



E. L. THURST0N FLUSHING APPARATUS. APPLICATION mam 111512.29. 1910.

Patented Apr. 4, 1911.

Inventor 15.? liunsian ing 1s a specifi UNITED STATES PATENT oEEioE.

EDWIN LANGDON THURSTON, OF BOSTON,

MASSACHUSETTS.

FLUSHING APPARATUS.

Specification of Letters Patent.

Patented Apr. 4, 1911.

Application filed April 29, 1910. Serial No. 558,515.

To all whom it may concern:

Be it known that I, EDWIN Lanenon THURSTON, of Boston, in the county of Suffolk and State of Massachusetts, have in- 5 vented certain new and useful Improvements in Flushing Apparatus, of which the follow to an appliance for flushing water closet bowls, et cetera, and has for its object to provide a simple an compact apparatus including a valve which is held closed by water pressure, means for opening the valve against the water pressure, and means for retarding the closing movement of the valve to produce a flow the desired duration.

The invention consists in the improved apparatus which I will now proceet 0 describe and claim.

Of the accompanying drawings, forming a part of this specification,--Figure 1 represents a side elevation of a flushing apparatus embodying my invention. Fig. 2 represents a longitudinal section of the same, the valve being closed. Fig. 3 represents a view similar to Fig. 2, showing he valve open and in the act of closing. Fig. 4 represents a section on line of Fig. 2. Fig. 5 represents a section on line 5--5 of Fig. 2. Figs. 6 and 7 represent sectional views illustrating the by-pass hereinafter referred to.

Same reference characters indicate the same or similar parts in all the figures.

In the drawings, 12 represents a con uit which is preferably of cylindrical form an is considerably elongated in proportion to its diameter. The conduit may be made in one or more sections. As illustrated, it comprises two sections connected by a union 13, which permits said sections dily disconnected to obtain access to the interior of the conduit. At one end portion of the inlet 14:,

branch constituting an adapted to be connected with a source of The oppoan outable The site end 16, of the conduit constitutes let which may be connected in any suit way with the closet bowl to be flushed.

outlet by a partition which includes an annular valve seat 17.

cross-bar 2.)

conduit is sub-divided between its inlet and The portion of the conduit between the valve seat and the inlet constitutes a valve chamber, in which is a valve adapted to be closed upon the seat 17 by the liquid pressure in said chamber. here shown includes a metal disk 18, and pressible washer 18 attached thereto and formed to bear upon the valve seat.

19 represents a stem connected with the valve and extending through the valve seat toward the outlet end of the conduit. The valve stem is provided with gear teeth 20, constituting a rack.

21 represents a rock shaft journaled in bearings on one side of the conduit and provided within the latter with a gear segmen 22, meshing with the rack 2 Said rock shaft is provided with a handle or lever 23 whereby it may be turned to cause the ole vation of the valve stem and the opening 0 the valve.

The conduit and valve stem are provided respectively wit members of a retarding device adapted to retard the closing movement of the valve, one of the said members being affixed to the conduit and the other to the valve stem. As here shown, member of the retarding device is a piston 24:, attached to a stem or red 25, which is secured by a screw 25', or otherwise, to a fixe within the conduit and near the outlet end of the same. The movable member of the retarding device is an inverted dash-pot 26, which is attached to the lower end of the valve stem and has a close sliding fit on the piston. The piston has a vent 27 comprising a nipple having an air assage which may be regulated by means of a screw 27 28 represents stem, said g the piston 2-. leather as illustrated, is such that air can pass it With some freedom during u-pisattached-a Washer 36-of-compressible ma- Ward movement of the dash pot cylinder so 'terlal WlllCll bears on the upper end of the as to enable the valveto be openedquickly sleeve 30 When the valvelstem is depressed, Without tendency to produce a vacuum in I and prevents leakage through the crevlce 65 said cylinder. When the lever 23 is re between the stem and the inner surface of leased, the valve and stem move by gravit-athe sleeve 30. tion, aided by the pressure of-Water on t-he claim:

inlet side of the valve in the direction required to close the valve, and also aided by 1,0 :the Water, as it escapes, acting onthe upper .end of the dash pot 26. The closing move-v V ment of the valve is retarded by the air eontained 'in the dash-pot, the air escaping slowly'through the vent 27until thevalve is closed. Provision is therefore made for a flushing .flow of anyidesired duration, the duration of flow depending on the size of the vent 27. 5 g I To ,permitran. easy,.opening n ovement of. ViClGCl the admission 0}? air tosaid dash 80 l "the valve, I provide means for :fOIl'IllIlg a;

elongated conduit having an inlet at one 70 on said seat-by liquid pressure, said valve 75 having a sleeve, a tubular stem extending through said sleeve and provided With an inverted dash-pot fitting said piston and required .to open the valve is materially-re Vduced. To this end, .I provide .the valve disk 18, with anupwardly projecting sleeve 30, which is open at itsupper end. .I also. make the valve stem independently movand a fixed retarding member adjacent to able to a lnnited extent rela-tlve'ly to the the outlet, a valve adapted to be closed on 90 said seat *by liquid pressure, and provided :Ward movement independent of the valve, the valve stem beingvprovided Witha shoulder .31Whicl1 abuts against .the under side ofthe valve when said 1m beenaccomplishechtheshoulder causing the valve --to move Withthe stem.

'The upper portion of the valve stem is tubular .and has ,a ,passage 32 extending through the valve. The upper .end of the 40 :passage has Water inlets 183, While its duit in the path of outflowing Water and 95 ,closingof the valve and means for opening the valveagainst theliquidpressure,thestem being movable to a limited extent "independently of the valve and having upper and test positions, the 11nlets33 :are closed by the .sleeve 30 as shown in. Fig. .6, b'utithe outlets I -34t/areneverclosed or obstructed. Theinitial upward movement .of the valve stem causes the inlets 33 to rise beforecthe sleeve l, 30, as shown gin Fig. 7, a by-pass through the valve being-thus formed beforethe valve ing movement of the valve, this movement .an inverted dash-pot carried bysaid stem taking place after the shoulder 31 contacts inthe path of outflowing Water to eoperate wlth t e val-vewith said fixed member in confining a "body The valve-isprovided With ears 35, Which of air to retard the closing of the valve, are in sliding contact with the interior ,con- .said stem having a tubular portion prolduit and prevent lateral displacement of-the vided With inlets andoutlets located res ecvalve. To the upper end of the valve stem tively at the inlet and outlet sides of the valve and having a shoulder intermediate In testimony whereof I have affixed my the inlets and outlets to engage said valve signature, in presence of two witnesses.

sleeve and means for moving the stem in the direction required to open the valve, the EDWIN LANGDQN rlHURSTON' 5 initial movement of the stem causing the Witnesses:

tubular portion of the stem to serve as a G. F. BROWN, by-pass before the valve is opened. P. W. PEZZETTI.

Copies of thispatent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

